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Global energy crises, limited energy resources and damage to nature in energy production have pushed humanity to use energy more efficiently and renewable energy sources. In this context, the importance of implementing energy efficiency and sustainable strategies in buildings that consumes high energy has increased. In this study, the effect of luminaires substitution with more efficient ones and electricity production by renewable energy sources on efficiency, sustainability and environment was examined on a sample education building. The calculations were made according to standards and equipment supplier data. As a result of this study, it has been found that the use of high-efficiency LED lighting instead of halogen or fluorescence luminaires in the engineering faculty building and laboratory of Hitit University, will reduce electricity consumption by 68.2%. In addition, it has been deduced that the solar energy system to be installed on the faculty's roof, will significantly reduce CO2 emission, and has a payback period of 5.5 years. In terms of gas emissions, a roof-mounted solar energy system is 21, 45, and 32 times less hazardous to the environment than natural gas, lignite, and fuel oil, respectively. [ABSTRACT FROM AUTHOR]

This research aims to study the effect of daylight on energy consumption in educational spaces of the Faculty of Engineering, Sohag University, by conducting a simulation using the design builder v7 program. The building was modeled based on the building drawing and the actual reality of implementation through frequent field visits, the data entered is energy consumption of electrical appliances and lighting units for space, occupancy schedules that determine the number of study hours, number of users including students, faculty members, and employees, activities that are practiced in the space, The recommended illumination level for each space. The different specifications of building materials and finishes were also entered (Visible absorptance, Surface light reflectance value, Roughness, Specularity reflection) and the specifications of windows, the dimming control system and The Perez All-weather sky method which requires the values of Direct Normal Irradiance (DNI), Diffuse Horizontal Irradiance (DIF) of the New Sohag area in Sohag Governorate. By simulation, it was found that the consumption of lighting energy in educational spaces decreases by 39.85% in the case of open windows than closed windows, and in the case of open windows in educational spaces, lighting energy consumes 29.32% of the building’s energy consumption, and in the case of closed windows in educational spaces, lighting energy consumes 40.82% of building energy consumption. [ABSTRACT FROM AUTHOR]